<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div class="toggle">
        <button type=”button” onclick=flip();>循环5次弹窗</button>
    </div>
    <script>
        function flip(){
            for (var i=0;i<5;i++){
                alert("这是第"+(i+1)+"次弹窗");
            }
        }
    </script>
</body>
</html>